Duna is the Hungarian name for the Danube River. Other places with the name Duna include: D'Una River, Brazil Duna (woreda), Hadiya Zone, Ethiopia Duna, Iran (disambiguation), places in Iran 23617 D
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14150f60a8387b40b5f96e4a17d5fd636cbae22d50a97fb302a61c278074e6ef. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00f3046d-f75a-449d-b146-d20a7e14a720.json and https://artists.proofprofile.net/proofs/artist/00f3046d-f75a-449d-b146-d20a7e14a720.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
J. Diggs Presents: Duna A.K.A. Baby Mac Dre Starring in Crack Baby
Barap Obama & Dro Biden - Me & The White Boy Starring in El Presidente
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80267713a47d129ba31d7b4c7c9be53689d6206b672c52bd4e61d19a4ee06edf. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBAE0900315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41186f5fef4169489ca683111f8d9be805f96db7b6e81d84c5b29bc923fd0af6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBAE1101397.
Make It Work (feat. 2 Chainz, J-Diggs, Philthy Rich & Young Fame) (Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb7c262d5c242a1c39f1574172e49d2553161091eca9eba569c13b1ed2e58d2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDYP1100103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab7d0953d7d2b2d18e17baacced5bd9f6f46f4db9eac815dabc93cc329bc298. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCQ60610041.
On Da Run (feat. Mac Dre, Duna, Mac Mall & Boss Hogg)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f806d93db7941177cbdc21e155d90511ba8ed240f5f69cb293adc0c10c82671. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBAE0900117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421be59e125cd9f8df437be3bae243401d266df435a9a1a90c0eeeeea255b0e7. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITRSE1600397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e2db5871ac9ed57f7e3889823e755e96a25b643cf76ef4629710414ebbba9b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITRSE1600398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaff7920e1db16a534c9857c0b8ef03cbd874aab08e53e6b7730357633b2402c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITRSE1600399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ee669edb642f2b11ac9d74c0e8fb78407c3d19a3608550a711138d5217e84f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITRSE1600400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf035497fd426b056d0270e398c2b14369ca86a55e8c3d5a2a28321aa8c5f00f1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITRSE1600401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e7b7e06186fda16f5b1a2ca830380a48f7d50494631dc6dfa94b8c6c61bbd0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITRSE1600402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739bfc8db6b70105e00c992f73726741c574e9155869d970ff8897ee5e823edc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITRSE1600403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09eb3f8107bb2fcf420d79b21e1a66b60bf71556d79d7a81c14fb03203a101b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITRSE1600404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb592ca89683b971a69cd9fb96d4b6488a14c1829e240cf3c52bfb7893e4b4e79. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITRSE1600405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0466758f28f21aa5f51a7411458a5b6018e3785a788e9f0f748ba148db1c3c6. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITRSE1600406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f7cde038db4f383e3a38c919ff75464fe958d60bc21c5e8e720e516b79f7ca. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITRSE1600407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3a0a31c15334eebc9d763b33f2c5a3e49576de676b0cd97c875586b81b1541. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITRSE1600408.